Grindstone



June 26, 1923. 1,460,171

I. F. NELSON I GRINDSTYONE Filed June a, 1e2'o INVEN TOR.

Mi 4M MM. A TTORNEYS.

. citizen ,of the -United States,, and resident of Racine, in the countyof Racine andState inghad to the accompanying drawings,

channel iron having supportingilegs 7101i Patented June 26, 1923.

I 1,466,171" PATENT, orrics.

Y IENART. nnnsoixtor anernn'fwrsconsrn;

- G INnsroNE. I

, Application filed time s, 1920. Serial No. 386,247.

To all whom it m ag 1 Beit known that I, Inner: NELSON, a

of Vl Visconsin, have inventednew and use ful Improvements Grindstones,of which.

the following isja description, reference bewhich are a part of thisspecification.

The present invention :relates to certain.

new and useful, improvements in grindstones and refers more particularlyto power driven grindstones. H j

It is one object of this invention to conmet the driving power to thegrindstonev by.

means of a drive shaft, substantiallyparallel with thegrindstonesupporting shaft and connected therewith by a drive connectionwhereby the direct pull upon the grindstone shaft is eliminated.

Another object of the present invention is to provide an improved formof bearing member mounted about one side of the grindstone supportingframe for journally mounting the grindstone shaft and drive shaft.

A further object of this invention is to provide a grindstone driven asdescribed and provided with means guarding the drive connection betweenthe drive shaft and the grindstone shaft.

A still further object of this invention is to provide a combinedgrindstone and emery wheel driven from one source of power and soarranged that a person may use either the grindstone or the emery wheelwithout shifting his position.

With the above and other objects in view which will appear as thedescription proceeds, my invention residesin the novel construction,combination and arrangement of parts substantially as hereinafterdescribed and more particularly defined by the appended claims, it beingunderstood that such changes in the precise embodiment of the hereindisclosed invention may be made as come within the scope of the claims.

In the accompanying drawing I have illustrated one complete example ofthe physical embodiment of my invention constructed according to thebest mode I have so far devised for the practical application of theprinciples thereof, and in which:

Figure 1 is a side view of a grindstone and emery wheel embodying thefeatures of my invent-ion;

Figure 2 a top plan view thereof; and

"Figure 3is-a view part in section and part in elevationtakentherethrough on the plane of the line '33 of-Figure Z1. r

., Referring now more particularly to the accompanying drawing,thenumeral 5 ,des-i ignates a supporting frame preferably, formed byiarectangular top portion 6of angle iron connected therewith, and bracedasat8.- I

Secured centrally on the top of one longi-r tudinal channel iron 6 is abearing mem-" bent) in which one end of a grindstone shaft 1Qis'journaled, the other end of the shaft being journaled ina-double,.bearing 11' i which is cutaway or recessed as at 12 to receivetheother longitudinal channel iron iron 6. I I

Mounted within the space formed by the rectangular framework 6 andcarried by the shaft 10 is a grindstone 16, and as usual in ing memberand the adjacent channel constructions of this charactenthe stone may Iv be turned by a hand crank 17 detachably connected to one square end ofthe shaft 9,

but in the present instance the wheel is designed to more especially berotated by power means (not shown) with which a drive belt'18 isconnected. j

The drive belt 18 is trained about a pulley 19 fixed to the outer end ofa drive shaft 20 journaled in the portion 21 of the bearing 11, and thisshaft is connected with the shaft 10 by a relatively small gear 22 fixedto the inner end thereof andme shed with a rela tively large gear 23fixed to the shaft 10. The gear connection between the shafts 10 and 20is'protected by a housing 24 which may be either cast integral with thebearing 11 or independent thereof, and as will be readily understood,the ratio between the gears22 and 23 is such as to best adapt the,

same to the power means with which it may be connected.

As oftentimes it is convenient to have an emerywheel positioned Where anoperator canuse the grindstone and emery wheel a1 The emery wheel 30 isdriven from the same source of power as the grindstone and has apulley3l secured to an end of shaft 29 projected beyond the bearing 27in line I with a relatively large pulley 32fixed to the pulleys 31 and32. provides the proper speed shaft 20, thepulleys 31 and 32 beingdrivingly connected by'a belt 33. The supplemental frame is providedwith some form of tool rest 34 and the ratio betweenthe for the emerywheel.

The grindstone runs in a trough or pan 35 adapted to retain water orother similar fluid; As will be readily obvious, I provide a combinedgrindstone and emery wheel which will perform their functionsina highlyefficient manner.

WVhat I claimas my invention is: x a 1. In combination, a supportingframe includingapair of spaced longitudinally extending'memb'ers, abracketsecured to one of said members and havingtwo bearings, a bearingassociated with the other'of said members, a grindstone supporting shaftone end of which is journaled in one of the first mentioned bearings andthe other end of which is journaled in the last mentioned bearing,adrive-shaft journaled in the other of the first mentioned bearings, andmeans operatively connecting said shafts;

2. In combination, a supporting frame including a pairv of spacedlongitudinally extending members, a bracket secured, to" oneof saidmembers and having two bearings, a bearing associated with the other ofsaid members, a grindstone supporting shaft one end of which isjournaled in one of the first mentionedbearings andthe other end of,which is journaled in the last mentioned bearing, a driveshaft journaledin the other of the first mentioned bearings, gears operativelyconnecting, said shaftS,a-nd a housing member carried'by said bracketand adapted to enclose said gears.

ture.

IENAR F. NELSON;

In testimony'whereof, I affix my signa

